Google has introduced an unsend feature that, apparently, really works (unlike Outlook’s recall feature). The only drawback is that you have to have a Google account, if you consider that a drawback.
clipped from www.popgadget.net

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If you haven’t heard of it yet, Gmail has recently introduced the “Undo Send” feature to recall an e-mail that you’ve sent.

This latest tweak allows you to reclaim your sent mail if it happens to be within 5 seconds of hitting the “Send” button. And that’s nothing short of an official manna from heaven as far as habitual offenders like me are concerned – my entries to the e-mail hall of shame are one too many as I most often end up clicking the “Send” button on my e-mail instead of the “Save” button.

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